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Cast-in-situ continuous beam construction method for special railway line stands

A technology for passenger dedicated lines and construction methods, which is applied in the direction of erecting/assembling bridges, bridges, bridge materials, etc., can solve the problems of cumbersome process operation, high material consumption, small working space, etc., and achieves simple process operation, low labor intensity, and construction. simple effect

Inactive Publication Date: 2009-02-18
THE 2ND ENG OF THE 12TH BUREAU GROUP OF CHINA RAILWAY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of small working space, large investment in equipment, high material consumption and cumbersome process operations in the construction of continuous bridges on existing railway passenger dedicated lines, the present invention provides a construction method for cast-in-situ continuous beams on railway passenger dedicated lines.

Method used

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  • Cast-in-situ continuous beam construction method for special railway line stands
  • Cast-in-situ continuous beam construction method for special railway line stands
  • Cast-in-situ continuous beam construction method for special railway line stands

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Embodiment Construction

[0021] The construction method of cast-in-situ continuous beams covered with supports for railway passenger dedicated lines includes the following steps:

[0022] (1) Foundation treatment: Excavate the surface backfill and humus soil within the scope of the support foundation, replace and fill with sand and pebbles in layers with a thickness of 1.5m (the density reaches more than 96%), and pour C20 concrete on it;

[0023] (2) Formwork project: the formwork is made of bamboo plywood, the vertical ribs of the formwork are 10×10cm square wood, the spacing is 15cm (clear distance 5cm), the panel is δ=15mm bamboo plywood, and the transverse back ribs are 2[8 channel steel, per square meter 1 tie rod is arranged, and the tie rod is round steel;

[0024] (3) Cast-in-place support: Bowl-buckle-type full-covered scaffolding is used as the support for cast-in-place beams. Bowl-buckle multifunctional scaffolding is an advanced socket-type steel pipe scaffolding, which has multiple fun...

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Abstract

The invention relates to passenger dedicated railway line bridge construction field, in particular relates to a method for constructing a cast-in-site continuous girder on a passenger dedicated railway line, which is provided with brackets, solving the problems of narrow operation room, large equipment investment, large material consumption and trivial operation processes in bridge construction of a passenger dedicated railway line in the prior art. The method includes the following steps: groundsill treatment, frame linking, formwork fabrication, support preliminary compression, steel bar prefabrication, steel conduit and corrugated pipes installation, pedestal construction, concrete casting, and prestress construction. The pedestal construction includes temporary pedestal construction and permanent pedestal construction; the prestress construction includes tensioning and anchor seal. The prestressing tendon of the girder is pulled in the direction order of vertical, transverse and then vertical, and unshrinkable cement mortar is used during anchor seal. The construction space is big and a plurality of work surfaces can work in parallel or crosswise. The invention has the advantages of simple construction and wide applicability and is easy to operate. The invention is suitable for girders with different spans and structures and is simple in operation, small in material consumption, large in turnover frequency and low in work intensity and can save cost and is safe and reliable and easy to popularize.

Description

technical field [0001] The invention relates to the field of bridge construction for railway passenger dedicated lines, in particular to a construction method for cast-in-situ continuous beams covered with supports for railway passenger dedicated lines. Background technique [0002] As the backbone of the transportation industry, railways play an important role in the development of my country's national economy. With the rapid development of our country's economy and the rapid improvement of people's living standards, with the increase of capital flow, service flow, people flow, technology flow, information flow and space expansion, the number of passenger transportation needs will increase significantly, and the demand for fast , Comfortable and safe service, these are the advantages of high-speed passenger dedicated line, the single railway passenger dedicated line and railway freight dedicated line are gradually replacing the original passenger and freight railway. [0...

Claims

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Application Information

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IPC IPC(8): E01D21/00E01D2/04E01D101/28
Inventor 史茂林史赵鹏许金海韩朝辉
Owner THE 2ND ENG OF THE 12TH BUREAU GROUP OF CHINA RAILWAY
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